The title compound, (C21H25N2)[ReO4], was formed as the
unexpected product in an attempted synthesis of a
rhenium(I)–N-heterocyclic carbene (NHC) complex. The
compound has crystallographic mirror symmetry with both
the ...

The asymmetric unit of the title salt C8H22N4
2+2C7H5O2
,
comprises two independent pairs of half a 2,2'-(piperazine-1,4-
diyl)diethanaminium dication plus a benzoate anion. The
dications are symmetrical and lie across ...

The asymmetric unit of the title salt, C6H20N4
2+ 2I , comprises
half a 3,6-diazaoctane-1,8-diaminium dication plus an I
anion. The dications are symmetrical and lie across crystallographic
centres of inversion. In ...

A fundamental understanding of the role of oxyanion geometry on molecular packing and non-covalent interactions in salt crystal structures is central to the fields of both molecular recognition and crystal engineering. The ...

Chemical modification of montmorillonite though popular may be expensive and environmentally noxious and can result in secondary contamination. Therefore, there is a need for eco-friendly and efficient treatment techniques. ...

Chrysophyllum albidium seed shell, an abundant, biodegradable and inexpensive natural resource was used as a
precursor to bioadsorbent production for the removal of suspended and dissolved particles (SDP) from ...

Various Cu/HZSM5-zeolites were prepared and their catalytic properties were investigated by productanalysis via GC/MS chromatography in order to trace down the mechanism of the gas phase one-stepoxidation of benzene to ...

A study carried out at the University of Pretoria characterised aerosol particle morphology of residential coal combustion smoke. The
general approach in this study was on individual particle conglomerations because the ...

We recently showed that the selective extraction of aluminium from the amorphous phase of a South African ultrafine coal fly ash can be achieved via thermochemical treatment with ammonium sulphate for 1 h followed by aqueous ...

Lubricity is the ability of a substance to prevent wear in a system where metal surfaces are
in close contact. Diesel fuel injection systems rely on the fuel itself for lubrication. GCXGC/
TOFMS and multivariate statistics ...

Heavy petroleum fractions are produced during crude and synthetic crude oil refining processes and they need to be upgraded to useable products to increase their market value. Usually these fractions are upgraded to fuel ...

The composition of the surface film formed on pure iron was investigated in a solution of 0.05M NaOH and 0.05M NaCl.
Raman spectra of the film were recorded in situ during anodic polarisation over the passive region after ...

BACKGROUND : Degradation of components of the extracellular matrix such as elastin and collagen by elastase and
collagenase accelerates skin aging. Phytochemicals that inhibit the activity of these enzymes can be developed ...

Bi(III) coordination chemistry has been largely neglected due to the difficulties faced when studying
these systems even though Bi(III) is used in various medicinal applications. This study of the Bi(III)–
picolinic acid ...

Many universities in South Afirca use alternative admissions tests together with results of the Grade 12 examinations for access of placement. These tests focus on academic literacy and mathematical skills and doe not ...

A furano sesquiterpenoid, known as siphonochilone (1), is commonly reported as the major compound in the roots and the rhizomes of Siphonochilus aethiopicus together with related oxidized sesquiterpenoids (2‐5). As part ...

A new method for the stereoselective synthesis of the (R,R)-b-hydroxy-a-alkyl fatty acid fragment of
mycolic acids, via an asymmetric anti-aldol reaction is reported. The ‘mycolic acid motif’ fragment was prepared in three ...